Oium was a name for Scythia, or a fertile part of it, roughly in modern Ukraine, where the Goths, under a legendary King Filimer, settled after leaving Gothiscandza, according to the Getica by Jordanes, written around 551.[1][2][3]
It is generally assumed that the story reproduced by Jordanes contains a historical core, although several scholars have suggested that parts of it are fictional.[4]